From day to day experience, anybody looking to re-print books in paper form is on a hiding to nothing.
In the last 18 months of commuting Kindles/IPads etc have gone from being an exotic rarity to being used by at least a third of the people on the train. Within the same period again it'll probably be fair to say that they will have near saturated the market (whether you think thats a good thing or not).
The possibilities for reprinting things in an electronic form if done properly are limitless however. Unlimited photos, interactive maps, directly linking with other websites & books etc.
I think that format works for harry potter and other popular books. However if you are considering Eric Hollands work information and plans you are more likely to want to have that in a book form and lets be honest a nice bookshelf of collectable books you can read at your leisure reasearch , take on site is far more satisfying than a flat backlit screen anyday
I am biased clearly but I suspect that I'm not alpne in this
Mike